The Rane AC 22S Active Crossover employs state-variable 4th-order Linkwitz-Riley filter alignments to eliminate phase problems. To further enhance transparency, it features adjustable time delay circuits on the low (and mid when used as a 3-way) outputs to compensate for any physical misalignment of the drivers. A mono subwoofer switch provides the option to sum both low outputs in stereo 2-way mode. The Rane AC 22S utilizes XLR connectors with active balanced inputs and outputs.